Which sentence should be edited for pronoun clarity?(1 point)

Question

The librarians received the box of new books, and they immediately opened and
unpacked it.
While Cindy and Patricia were walking down the hall, she noticed a sign on the teacher’s
door.
The teacher told the class that she wanted their papers to be turned in by the end of the
day on Friday.
On the way to the post office with Donald, Gerald realized that he forgot to check his
email.

Answer 1

The sentence that should be edited for pronoun clarity is:

"While Cindy and Patricia were walking down the hall, she noticed a sign on the teacher’s door."

In this sentence, it's unclear whether "she" refers to Cindy or Patricia. It would be clearer to specify which person noticed the sign.